Air to furnaces



(No Model.) 2 Shets-Sheet 1.

J. B. BEGKMAN. 4

APPARATUS FOR AUTOMATICALLY GONTROLLING MOTIVE POWER FOR SUPPLYING AIRT0 FURNACES:

No. 537,264. Patented Apr. 9, 1895.

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(No Model.) 2 Sheets-Sheet 2.

J. E. BECKMAN.

APPARATUS FOR AUTOMATICALLY CONTROLLING MOTIVE POWER FOB.

SUPPLYING AIR T0 PURNAGES.

No. 537,264. Patented Apr. 9, 1895.

' rmzi llNiTEoSTAT-ns' PATENT canine.

JOHN E. BEOKMAN, OF BUFFALO, NEW YORK, ASSIGNOR OF THREE-FOURTHS TOWILLIAM .E. WOOLLEY, HENRY LEY, OF SAME PLACE.

M. GERRANS, AND GEORGE H. WOOL- APPARATUS FOR AUTOMATICALLY CONTROLLINGMOTlVE POWER FOB SUPPLYING AIR TO FURNACES.

SPECIFICATION forming part of Letters Pate tNo. 37.264, dated A rn9,1895.

Application filed January 27,1 894.

To all whom it may concern:

Be it known that I, JOHN E. BEOKMAN, a citizen of the United States,residingat Buffalo, in the county of Erie and State of New 5 York, haveinvented certain new and useful Improvements in Apparatus forAutomatically Controlling the Motive PowerthatSupplies Air to Furnaces;and I do hereby declare the-following to be a full, clear, and exto actdescriptionflof the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to figures of reference markedthereon, which r 5 form a part of this specification.

My invention relates toimprovementsin the feeding of a forced draft tofurnaces and more particularly to the automatic regulation of saidforced draft. 7

The object of my present invention is to automatically regulate thisblast of air to the furnace by the pressure of the steam in the boilerand to that end it consists in a novel arrangement of parts connecteddirectly to the boiler and to the steam supply pipe leading from theboiler to the motor employed for operating the fan, by means of whichits speed is automatically regulated by the press ure of the steam inthe boiler.

I will now proceed to definitely describe the manner in which I havecarried out my in vention and then claim what I believe to be novel.

In the drawings, Figure l is a plan View 3 5 showing the settings of abattery of two boilers taken just above the bridge-wall and showing thearrangement of forced blast passages leading from a fan or blower. Fig.2 is an end View of the steam engine employed for operating the blower,showing the automatic regulating apparatus connected to the steam supplypipe; and Fig. 3 is a top-plan view ofthe regulating valve upon thesupply-pipe with automatic attachment for limiting the pressure supplyby means of the blast pressure.

Referring to the drawings, 1 is the setting of the boiler in which are,arranged the ash 'pits 2, fire boxes 3 and combustion chambers 12.

4 is a fan or blower for generating the arti- 5o ficial blast, which iscarried through the pas- Serial No 498,170 (No model.)

sage 7 to the furnace where it passes into the ash pits 2 through thereduced passages 8. 8. which pass through the bridge walls 13. 13. Atthe mouths of. these passages 8. 8. are arranged the dampers 9. 9.hinged to the rods 10. 10 and operated by the connecting rods 11. 11'.

The motive power is imparted to the blower 4, through the belt pulley 5,mounted upon the shaft 6, with the fan.

The construction thus far described is of old and well known form and tothis arrange ment of parts I apply the motor for operating the fan whichis regulated automatically by the pressure from the boiler and thepressure of air in the blast passage. (See Fig. 2.)

14 is the engine for operating the blower to which it is connected bybelt (not shown) passing over the pulleys l5 and 5.

16 is the supply pipe leading to the steam box 17. In this pipe 16 arearranged the throttle valve 18, and the regulating valves 19 and 20.Leading into the regulating valve 20 is the pipe 21 which is connecteddirectly with the boiler pressure.

22 is an auxilary passage or by-pass provided with the valve 23 so as topermit sufficient steam to pass into the cylinder to keep the engine inmotion when the steam is entirely shut off by the regulating-valve 20.Instead of the pipe 22 a by-pass could be made in the regulating valve20.

The regulating valve 19 as, represented in Fig. 2, is adapted to beregulated by hand, but in Figs. 1 and 3 I have shown an improvedattachment by means of which the valve 19 substituted for the valve 19in Fig. 2 may, if deemed desirable, be automatically regulated from theblast pressure. In such figures 24 is a chamber one side of which isconnected by pipe 25 with the blast passage 7 The diaphragm'v isconnected with a pivoted lever 26. which latter is loosely connectedwith the arm 27 rigidly secured to the valve 19. The action of the blastpressure, through pipe 25, upon 5 the diaphragm in chamber 24 serves. toautomatically regulate the action of this valve, and in this manner thespeed of the motor is automatically controlled direct from the blastpressure. The diaphragm employed should I00 necessarily be of large sizeand of such a sensitive nature as to quickly respond to the variationsin the blast pressure.

In operation the regulating valve 19 is first set so as to permitsufiicient steam to pass through it to give the highest rate of speeddesired to the fan, and the valve 23 in the auxiliary passage or by-pass22 is set to give the lowest rate of speed desired or just sufiicient togenerate enough blast to keep the grate-bars from burning and keep thecrank arm of the engine oif its center. The engine is started by openingthe throttle 1S, and as the pressure in the boilers is increased it iscommunicated through the pipe 21, to the pressure regulator 20 causingit to close, thus reducing the speed of the engine which is now beingfed through the auxiliary passage or bypass 22. As the pressure of theboilers is reduced the regulating valve 20 is opened thus increasing thespeed of the engine and likewise the force of the blast, up to theestablished pressure. In this manner a steady blast of air is maintainedat all times.

The valves 19, 20 and 23 are individually of well known form andtherefore not shown in detail as others might be substituted.

Vhile my invention is herein shown as applied to stationary boilers itcan equally well be applied to all other classes of boilers such aslocomotive, marine, time.

The primary object of this invention is to automatically regulate themotive power which produces the artificial blast by the pressure of theboilers and the blast pressure and should it be found desirable toarrange an automatic regulator to manipulate rheostats connected to anelectric motor for operating the blower the same result may be eifected.

I claim- 1. An automatic apparatus for regulating the motive power forsupplying an artificial draft under furnaces consisting of a fan orblower, an engine for driving the fan, a valve in the supply pipe of theengine, a separate pipe connected with the pressure of the boiler andadapted to close this valve in the supply pipe completely at a certainboiler pressure, and a by-pass valve for permitting a small flow ofpressure through or by said regulating valve, as and for the purpose setforth.

2. An automatic apparatus for regulating the motive power for supplyingan artificial draft under furnaces consisting of a fan or blower, anengine for driving the fan, a valve in the supply pipe of the engine,and a separate pipe connected with the pressure of the boiler andadapted to close this valve in the supply pipe completely at a certainboiler pressure, as and for the purpose set forth.

3: An automatic apparatus for regulating the motive power for supplyingan artificial draft under furnaces consisting of a fan or blower, amotor for driving the fan, a regulating valve in the supply pipe of themotor connected with and adapted to be operated by the pressure of theboiler, a by-pass for permitting a small flow of pressure through or bysaid regulating valve, a second regulating valve in the supply pipe, adiaphragm chamber one side of which is connected with the blast pressureand the diaphragm of which controls a lever, and connections betweensaid lever and second valve for automatically operating the latter bythe blast pressure, as and for the purpose set forth.

4. An automatic apparatus for regulating the motive power for supplyingan artificial draft under furnaces consisting of a fan or blower, anengine for driving the fan, a regulating valve in the supply pipe of theengine connected with and adapted to be operated by the pressure of theboiler, a second regulating valve in the supply pipe of the engine, andmeans for automatically operating this valve by blast pressure, as andfor the purpose set forth.

5. An automatic apparatus for regulating the motive power for supplyingan artificial draft under furnaces consisting of a fan or blower, amotor for driving the fan, a regulating valve in the supply pipe of themotor connected with the pressure of the boiler and adapted to closecompletely at a certain steam pressure, a bypass and valve forpermitting a small flow of pressure through or by said regulating valve,and a second automaticallyoperated reducing valve in the supply pipe ofthe engine, as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN E. BECKMAN.

Witnesses:

W. T. MILLER,

O. E. HODDICK.

